Tonguez
A suffusion of yellow
Though to be fair, the Fighter really didn't have an "army". At most you're looking at 1 7th level Fighter, 20 0-level cavalry and 100 0-level infantry. According to what I've seen on the internet, a cavalry regiment alone during the medieval period was 600 to 900 men!
Edit: forgot the possibility of 30 1st-level infantry. Still, 151 guys isn't really the kind of force you can knock over a small nation with.
French records show 12th century Banneretum leading 50-100 men-at-arms. Which accords with a PC Hero as a single ‘knight’ with his immediate retinue.
Armies were made up of multiple such retinues and peasant levies not just a single leader